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Status Not under consideration
Workspace Db2 for z/OS
Created by Guest
Created on Jun 14, 2012

threshold "DATASPACERATIO" in SP SYSPROC.DSNACCOX

The same in MR1209102911:
The Stored Procedure SYSPROC.DSNACCOX can be started with a
threshold for "DATASPACERATIO" to detect over allocations.
The IBM default is set to 2.

However if a tablespace or index with a small allocation are defined
(systablepart, sysindexpart ), 48 Kb or a track, and there are
very few rows available in that TS or IX, then the Stored Proc triggers
the involved TS or IX to be ALTERED with a REORG, because of the
threshold has been reached.
So these TS or IX are seen as over allocated, while they can not be
allocation with less space.

Should it not be better to start calculation above a minimum allocation,
or why not define a minimum allocation (lets say 200 tracks ).

.

The customer needs a new threshold, as low border with an IBM default
of at least 48k ( the lowest allocation ) to avoid REORGS to be triggered
on a Tablespace and Index with a minium of pages.

The coding the customer has to write to avoid this behaviour ( a bypass )
is far too mutch and is in conflict with the objective of DSNACCOX itself,
trigger of what was copied, reorged or runstat.
  • Admin
    Janet Figone
    Reply
    |
    May 6, 2021

    Thank you for submitting this enhancement request. While we view all the enhancement requests we receive as valuable and we would like to implement all of them, in an effort to have maximum transparency we are closing the ones that don’t currently appear on our two year product roadmap. This is not to say that these enhancements may not still be implemented at some point in the future as we do evaluate our requirements on the basis of customer demand and technical impact, to deliver maximum value to our customers.


    We appreciate your input to the Db2 for z/OS development team.  And we hope that you will continue to submit enhancement suggestions for improvements as customer feedback is a key component to shaping the future direction of Db2 for z/OS. 


    Sincerely,

    The Db2 for z/OS Team